Plex - Dell Tiny PCs - Intel Coffeelake GPU - card0/card1

[vikramwalia]

I used ttech's scripts to install plex on one of my proxmox machine( Thank you for providing that , it is amazing) . That script also creates card1/0 and passes it through to the plex lxc. In my not so smart brain.. I used that script to create plex lxcs on my other proxmox servers as well and then delete them all except one. The problem now is that 2 proxmox servers have it as card0 and other 2 have it as card1.

pmox04 - card1
pmox05 - card1
pmox06 - card0
pmox07 - card0

Is there was way I can rename the card0 to card1 ? Plex is the only lxc using it and I would love to have all machines on card1 if possible so that when I migrate or use HA, it would move over without any issues. Can I create a symlink or point card1 to card0 ? any ideas suggestions as welcome.

[tteck]

The script checks for card0 if not found sets it to card1

Proxmox/misc/build.func

Lines 607 to 621 in 5e515c1

	if [[ -e "/dev/dri/renderD128" ]]; then
	if [[ -e "/dev/dri/card0" ]]; then
	cat <<EOF >>$LXC_CONFIG
	# VAAPI hardware transcoding
	dev0: /dev/dri/card0,gid=44
	dev1: /dev/dri/renderD128,gid=104
	EOF
	else
	cat <<EOF >>$LXC_CONFIG
	# VAAPI hardware transcoding
	dev0: /dev/dri/card1,gid=44
	dev1: /dev/dri/renderD128,gid=104
	EOF
	fi
	fi

With a recent update, it changed some systems from card0 to card1 for reasons I don't know. This is why I had to add a check.

[tteck]

BTW, my system was also affected by the card rename 🤷🏻‍♂️

[vikramwalia]

Thanks much for the reply, is there a way to do a symlink or something similar ? my Goal is to get HA working.

[tteck]

This may work.

nano /etc/systemd/system/create-symlink.service

[Unit]
Description=Create symbolic link for graphics card

[Service]
Type=oneshot
ExecStart=/bin/ln -s /dev/dri/card1 /dev/dri/card0

[Install]
WantedBy=multi-user.target

systemctl enable --now create-symlink.service

[vikramwalia]

That would be the easiest. I am going to test out systemd and also look at udev as well.

[pedro1977]

Any update on this? I did a test migration and encountered the same issue. Is a symlink the best set and forget solution?

[vikramwalia]

Yes, symlink is a set it forget it solution. At least for me it survived two reboots and it works.

[psilantropy]

Thanks tteck. 3 NUC11 nodes, one stuck on card1, others card0.
Symlink works perfectly.

[vikramwalia]

On another note, I did ask exactly the same question in proxmox forums as well. The suggested path was to look at udev rules. I am going to look into that as well to see if we can have a more permanent solution i.e. pin card0 vs having card1.

Link : https://forum.proxmox.com/threads/plex-dell-tiny-pcs-intel-coffeelake-gpu-card0-card1.148146/#post-669850

[avluis]

This issue is the result of early initialization of several framebuffer drivers (load order something along those lines, prior refs are not turning up much) but essentially as was discovered here, setup a symlink from card1 pointing to card0 and that will address this (that is until another kernel update that might address this).

This affected my N5xxx, N6xxx nodes and a Lenovo Tiny with a Gen 9 i5 (basically anything with a GPU, built-in or addon).
Other refs on this: https://bbs.archlinux.org/viewtopic.php?id=287936 | https://www.linux.org/threads/video-card-being-being-added-as-card1-instead-of-card0.46280/ | https://bbs.archlinux.org/viewtopic.php?id=288578